[Security] Bump rails from 5.1.0 to 5.1.7

[dependabot-preview]

Bumps rails from 5.1.0 to 5.1.7. This update includes security fixes.

Vulnerabilities fixed

Sourced from The GitHub Security Advisory Database.

Critical severity vulnerability that affects actionview

Denial of Service Vulnerability in Action View

Impact

Specially crafted accept headers can cause the Action View template location
code to consume 100% CPU, causing the server unable to process requests. This
impacts all Rails applications that render views.

All users running an affected release should either upgrade or use one of the
workarounds immediately.

Releases

The 6.0.0.beta3, 5.2.2.1, 5.1.6.2, 5.0.7.2, and 4.2.11.1 releases are
available at the normal locations.

Workarounds

This vulnerability can be mitigated by wrapping render calls with
respond_to blocks. For example, the following example is vulnerable:

... (truncated)

Affected versions: >= 5.1.0, <= 5.1.6.1

Sourced from The GitHub Security Advisory Database.

High severity vulnerability that affects actionview

File Content Disclosure in Action View

Impact

There is a possible file content disclosure vulnerability in Action View.
Specially crafted accept headers in combination with calls to render file:
can cause arbitrary files on the target server to be rendered, disclosing the
file contents.

The impact is limited to calls to render which render file contents without
a specified accept format. Impacted code in a controller looks something like
this:

class UserController < ApplicationController 
  def index 
    render file: "#{Rails.root}/some/file" 
  end 
end 

... (truncated)

Affected versions: >= 5.1.0, <= 5.1.6.1

Sourced from The Ruby Advisory Database.

Broken Access Control vulnerability in Active Job
There is a vulnerability in Active Job. This vulnerability has been assigned the CVE identifier CVE-2018-16476.

Impact

Carefully crafted user input can cause Active Job to deserialize it using GlobalId and allow an attacker to have access to information that they should not have.

Vulnerable code will look something like this:

MyJob.perform_later(user_input)

All users running an affected release should either upgrade or use one of the workarounds immediately.

Patched versions: >= 4.2.11, < 5.0.0; >= 5.0.7.1, < 5.1.0; >= 5.1.6.1, < 5.2.0; >= 5.2.1.1
Unaffected versions: < 4.2.0

Release notes

Sourced from rails's releases.

5.1.7

Active Support

• No changes.

Active Model

• No changes.

Active Record

• Fix touch option to behave consistently with Persistence#touch method.

  Ryuta Kamizono

• Back port Rails 5.2 reverse_order Arel SQL literal fix.

  Matt Jones, Brooke Kuhlmann

• becomes should clear the mutation tracker which is created in after_initialize.

  Fixes #32867.

  Ryuta Kamizono

Action View

• Fix issue with button_to's to_form_params

  button_to was throwing exception when invoked with params hash that
  contains symbol and string keys. The reason for the exception was that
  to_form_params was comparing the given symbol and string keys.

  The issue is fixed by turning all keys to strings inside
  to_form_params before comparing them.

  Georgi Georgiev

Action Pack

• No changes.

... (truncated)

Commits

• 4f66945 Preparing for 5.1.7 release
• ce0c4f3 Preparing for 5.1.7.rc1 release
• 6e4906b Fix announce script
• c850941 Fix release template
• 98d0f7c Fix Gemfile.lock
• 3dafcc1 Merge branch 'v5-1-6-2' into 5-1-stable
• ec8697b Prep release
• 92c025d Only accept formats from registered mime types
• b4f39c4 Merge pull request #35560 from eileencodes/fix-5-1-stable-build
• faa96dc Merge pull request #35299 from kamipo/fix_mismatched_foreign_key
• Additional commits viewable in compare view

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[coveralls]

Coverage remained the same at 72.149% when pulling 88664f4 on dependabot/bundler/rails-5.1.7 into 41749ba on master.